Temp. guage 94 Topaz

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Rene - 06 Mar 2006 16:45 GMT

What am I missing. Temp guage on my 94 Topaz barely moves, even on a
long run. Not the fuse, replaced thermostat and temp. sensor, the one by
the thermostst. Car works excellant {160,000 orig. km} lots of heat. Gas
milege is down 6 miles per gallon to 20 from 26. Winter will account for
some of this but I have a feeling something is telling the computer that
the car is running cooler than it actually is, but I'm no mechanic.
Anyone have any ideas,
Thanks
Rene

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Sharon K.Cooke - 06 Mar 2006 18:34 GMT

> What am I missing. Temp guage on my 94 Topaz barely moves, even on a
> long run. Not the fuse, replaced thermostat and temp. sensor, the one by
[quoted text clipped - 5 lines]
> Thanks
> Rene

Thermostat may still be bad, even a new one. Does electric cooling fan behind
radiator always stay on? It shouldn't. More than 50/50 coolant mix (-34º F.) can
affect heat transfer also, giving a false reading to sender - sender should NOT
have any sealant on threads, which will give a poor ground. Ground sender wire
to block MOMENTARILY with ignition on to check gauge and/or sender WIRE; gauge
should go full hot in less than 2 seconds.

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